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| -rw-r--r-- | progs/tests/texrect.c | 297 |
1 files changed, 297 insertions, 0 deletions
diff --git a/progs/tests/texrect.c b/progs/tests/texrect.c new file mode 100644 index 0000000000..1468c73385 --- /dev/null +++ b/progs/tests/texrect.c @@ -0,0 +1,297 @@ +/* $Id: texrect.c,v 1.1 2002/06/15 03:08:19 brianp Exp $ */ + +/* GL_NV_texture_rectangle test + * + * Brian Paul + * 14 June 2002 + */ + + +#include <math.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <GL/glut.h> + +#include "readtex.c" /* I know, this is a hack. */ + +#define TEXTURE_0_FILE "../images/girl.rgb" +#define TEXTURE_1_FILE "../images/reflect.rgb" + +#define TEX0 1 +#define TEX7 8 +#define ANIMATE 10 +#define QUIT 100 + +static GLboolean Animate = GL_TRUE; +static GLint NumUnits = 2; +static GLboolean TexEnabled[8]; +static GLint Width[8], Height[8]; /* image sizes */ +static GLenum Format[8]; + +static GLfloat Xrot = 00.0, Yrot = 00.0, Zrot = 0.0; + + +static void Idle( void ) +{ + Zrot += 1.0; + glutPostRedisplay(); +} + + +static void DrawObject(void) +{ + GLint i; + GLfloat d = 0; /* set this >0 to test clamping */ + + glColor3f(.1, .1, .1); /* modulate this */ + + glPushMatrix(); + + glRotatef(Zrot, 0, 0, 1); + + glBegin(GL_QUADS); + + for (i = 0; i < NumUnits; i++) + glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, -d, -d); + glVertex2f(-1.0, -1.0); + + for (i = 0; i < NumUnits; i++) + glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, Width[i]+d, -3); + glVertex2f(1.0, -1.0); + + for (i = 0; i < NumUnits; i++) + glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, Width[i]+d, Height[i]+3); + glVertex2f(1.0, 1.0); + + for (i = 0; i < NumUnits; i++) + glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, -d, Height[i]+d); + glVertex2f(-1.0, 1.0); + + glEnd(); + glPopMatrix(); +} + + +static void Display( void ) +{ + glClear( GL_COLOR_BUFFER_BIT ); + + glPushMatrix(); + glRotatef(Xrot, 1.0, 0.0, 0.0); + glRotatef(Yrot, 0.0, 1.0, 0.0); + glRotatef(Zrot, 0.0, 0.0, 1.0); + glScalef(5.0, 5.0, 5.0); + DrawObject(); + glPopMatrix(); + + glutSwapBuffers(); +} + + +static void Reshape( int width, int height ) +{ + glViewport( 0, 0, width, height ); + glMatrixMode( GL_PROJECTION ); + glLoadIdentity(); + glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 100.0 ); + glMatrixMode( GL_MODELVIEW ); + glLoadIdentity(); + glTranslatef( 0.0, 0.0, -35.0 ); +} + + +static void ModeMenu(int entry) +{ + if (entry >= TEX0 && entry < TEX0 + NumUnits) { + /* toggle */ + GLint i = entry - TEX0; + TexEnabled[i] = !TexEnabled[i]; + glActiveTextureARB(GL_TEXTURE0_ARB + i); + if (TexEnabled[i]) { + glEnable(GL_TEXTURE_RECTANGLE_NV); + } + else { + glDisable(GL_TEXTURE_RECTANGLE_NV); + } + printf("Enabled: "); + for (i = 0; i < NumUnits; i++) + printf("%d ", (int) TexEnabled[i]); + printf("\n"); + } + else if (entry==ANIMATE) { + Animate = !Animate; + if (Animate) + glutIdleFunc(Idle); + else + glutIdleFunc(NULL); + } + else if (entry==QUIT) { + exit(0); + } + + glutPostRedisplay(); +} + + +static void Key( unsigned char key, int x, int y ) +{ + (void) x; + (void) y; + switch (key) { + case 27: + exit(0); + break; + } + glutPostRedisplay(); +} + + +static void SpecialKey( int key, int x, int y ) +{ + float step = 3.0; + (void) x; + (void) y; + + switch (key) { + case GLUT_KEY_UP: + Xrot += step; + break; + case GLUT_KEY_DOWN: + Xrot -= step; + break; + case GLUT_KEY_LEFT: + Yrot += step; + break; + case GLUT_KEY_RIGHT: + Yrot -= step; + break; + } + glutPostRedisplay(); +} + + +static void Init( int argc, char *argv[] ) +{ + GLuint texObj[8]; + GLint size, i; + + if (!glutExtensionSupported("GL_ARB_multitexture")) { + printf("Sorry, GL_ARB_multitexture needed by this program\n"); + exit(1); + } + + if (!glutExtensionSupported("GL_NV_texture_rectangle")) { + printf("Sorry, GL_NV_texture_rectangle needed by this program\n"); + exit(1); + } + + glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &NumUnits); + printf("%d texture units supported, using 2.\n", NumUnits); + if (NumUnits > 2) + NumUnits = 2; + + glGetIntegerv(GL_MAX_RECTANGLE_TEXTURE_SIZE_NV, &size); + printf("%d x %d max texture rectangle size\n", size, size); + + glPixelStorei(GL_UNPACK_ALIGNMENT, 1); + + for (i = 0; i < NumUnits; i++) { + TexEnabled[i] = GL_TRUE; + } + + /* allocate two texture objects */ + glGenTextures(NumUnits, texObj); + + /* setup the texture objects */ + for (i = 0; i < NumUnits; i++) { + + glActiveTextureARB(GL_TEXTURE0_ARB + i); + + glBindTexture(GL_TEXTURE_RECTANGLE_NV, texObj[i]); + glTexParameteri(GL_TEXTURE_RECTANGLE_NV, + GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_RECTANGLE_NV, + GL_TEXTURE_MAG_FILTER, GL_NEAREST); + + if (i == 0) { + GLubyte *img = LoadRGBImage(TEXTURE_0_FILE, &Width[0], &Height[0], + &Format[0]); + if (!img) { + printf("Error: couldn't load texture image\n"); + exit(1); + } + printf("Texture %d: %s (%d x %d)\n", i, + TEXTURE_0_FILE, Width[0], Height[0]); + glTexImage2D(GL_TEXTURE_RECTANGLE_NV, 0, GL_RGB, + Width[0], Height[0], 0, + Format[0], GL_UNSIGNED_BYTE, img); + } + else { + GLubyte *img = LoadRGBImage(TEXTURE_1_FILE, &Width[1], &Height[1], + &Format[1]); + if (!img) { + printf("Error: couldn't load texture image\n"); + exit(1); + } + printf("Texture %d: %s (%d x %d)\n", i, + TEXTURE_1_FILE, Width[1], Height[1]); + glTexImage2D(GL_TEXTURE_RECTANGLE_NV, 0, GL_RGB, + Width[1], Height[1], 0, + Format[1], GL_UNSIGNED_BYTE, img); + } + + if (i < 1) + glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_ADD); + else + glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_ADD); + + if (TexEnabled[i]) + glEnable(GL_TEXTURE_RECTANGLE_NV); + } + + glShadeModel(GL_FLAT); + glClearColor(0.3, 0.3, 0.4, 1.0); + + if (argc > 1 && strcmp(argv[1], "-info")==0) { + printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER)); + printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION)); + printf("GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR)); + printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS)); + } +} + + +int main( int argc, char *argv[] ) +{ + GLint i; + + glutInit( &argc, argv ); + glutInitWindowSize( 300, 300 ); + glutInitWindowPosition( 0, 0 ); + glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE ); + glutCreateWindow(argv[0] ); + + Init( argc, argv ); + + glutReshapeFunc( Reshape ); + glutKeyboardFunc( Key ); + glutSpecialFunc( SpecialKey ); + glutDisplayFunc( Display ); + if (Animate) + glutIdleFunc( Idle ); + + glutCreateMenu(ModeMenu); + + for (i = 0; i < NumUnits; i++) { + char s[100]; + sprintf(s, "Toggle Texture %d", i); + glutAddMenuEntry(s, TEX0 + i); + } + glutAddMenuEntry("Toggle Animation", ANIMATE); + glutAddMenuEntry("Quit", QUIT); + glutAttachMenu(GLUT_RIGHT_BUTTON); + + glutMainLoop(); + return 0; +} |